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bleachers

07-25-2008 06:44 AM

Spark Plug

What is the best spark plug to use in my 500 hp that has been made to a mild 540/600. i do not even remeber what the OE spark plug number was, i think it was a NGK?

Run_em_hard

07-25-2008 06:50 AM

The stock plug is a NGK, #5 or #4 I think. Can't tell you the part number off the top of my head, sorry.

DareDevil

07-25-2008 09:28 AM

I would run a NGK # 6 in it !

I ran those in all my stock and modified engines and they work great.

They are a good mid.range heat plug.

baja36ft

07-25-2008 09:59 AM

Quote:

Originally Posted by bleachers (Post 2634447)

What is the best spark plug to use in my 500 hp that has been made to a mild 540/600. i do not even remeber what the OE spark plug number was, i think it was a NGK?

a/c mr43t
ngk br6fs

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